From: Timo Sirainen <tss@iki.fi>
Date: Sun, 5 Oct 2008 10:48:32 +0000 (+0300)
Subject: Test if posix_fallocate() works already in configure.
X-Git-Tag: 1.2.alpha2~21
X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=19ee2dfe44a61df4d1a9c0b0b87e070204e6def2;p=thirdparty%2Fdovecot%2Fcore.git

Test if posix_fallocate() works already in configure.

--HG--
branch : HEAD
---

diff --git a/configure.in b/configure.in
index 15d1e44aa1..2c335f9e92 100644
--- a/configure.in
+++ b/configure.in
@@ -652,17 +652,37 @@ AC_TRY_COMPILE([
 ])
 
 dnl * Old glibcs have broken posix_fallocate(). Make sure not to use it.
-AC_TRY_LINK([
-  #define _XOPEN_SOURCE 600
-  #include <stdlib.h>
-  #if defined(__GLIBC__) && (__GLIBC__ < 2 || __GLIBC_MINOR__ < 7)
-    possibly broken posix_fallocate
-  #endif
-], [
-  posix_fallocate(0, 0, 0);
-], [
-  AC_DEFINE(HAVE_POSIX_FALLOCATE,, Define if you have a working posix_fallocate())
+dnl * It may also be broken in AIX.
+AC_CACHE_CHECK([whether posix_fallocate() works],i_cv_posix_fallocate_works,[
+  AC_TRY_RUN([
+    #define _XOPEN_SOURCE 600
+    #include <stdio.h>
+    #include <stdlib.h>
+    #include <fcntl.h>
+    #include <unistd.h>
+    #if defined(__GLIBC__) && (__GLIBC__ < 2 || __GLIBC_MINOR__ < 7)
+      possibly broken posix_fallocate
+    #endif
+    int main() {
+      int fd = creat("conftest.temp", 0600);
+      int ret;
+      if (fd == -1) {
+	perror("creat()");
+	return 2;
+      }
+      ret = posix_fallocate(fd, 1024, 1024) < 0 ? 1 : 0;
+      unlink("conftest.temp");
+      return ret;
+    }
+  ], [
+    i_cv_posix_fallocate_works=yes
+  ], [
+    i_cv_posix_fallocate_works=no
+  ])
 ])
+if test $i_cv_posix_fallocate_works = yes; then
+  AC_DEFINE(HAVE_POSIX_FALLOCATE,, Define if you have a working posix_fallocate())
+fi
 
 dnl * OS specific options
 case "$host_os" in